Affects Juniper Junos (widely deployed network core OS); adjacency exploit can crash routing daemon and disrupt network infrastructure at scale.
CVE-2026-102026
Adjacent eBGP peer can crash Junos rpd via crafted BGP update with RIB sharding.
Is CVE-2026-102026 being exploited?
Not confirmed. CVE-2026-102026 does not appear in CISA's Known Exploited Vulnerabilities catalog, which records only exploitation that has been observed and reported publicly. That is evidence of absence of a report, not evidence the flaw is unattacked. EPSS currently estimates a 0.46% probability of exploitation in the next 30 days.
How severe is CVE-2026-102026?
CVE-2026-102026 is rated High with a CVSS score of 8.7. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.
Is there a patch for CVE-2026-102026?
Not known from our data. No patch reference has been recorded for CVE-2026-102026, which is not the same as no patch existing — a fix may have shipped without a tagged reference, or after this record was written. The vendor advisory is the only authority on whether a fix exists, and mitigations may be available regardless.
What does CVE-2026-102026 affect?
CVE-2026-102026 affects Juniper Junos OS (rpd), Juniper Junos OS Evolved (rpd). Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-102026?
Follow Juniper advisory; restrict/unpeer untrusted eBGP peers, consider disabling RIB sharding, apply vendor fix when available.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Adjacent eBGP peer can crash rpd causing routing-daemon outage and network routing disruption/DoS.
Immediate action required
- affected< 23.2R2-S7.7
- affected>= 23.4 and < 23.4R2-S8.13
- affected>= 24.2 and < 24.2R2-S5.5
- affected>= 24.4 and < 24.4R2-S5
- affected>= 25.2 and < 25.2R2-S2
- affected>= 25.4 and < 25.4R1-S3
- affected>= 26.2 and < 26.2R1-S2
- affected< 23.2R2-S7.7-EVO
- affected>= 23.4 and < 23.4R2-S8.11-EVO
- affected>= 24.2 and < 24.2R2-S5.6-EVO
- affected>= 24.4 and < 24.4R2-S5-EVO
- affected>= 25.2 and < 25.2R2-S2-EVO
- affected>= 25.4 and < 25.4R1-S3-EVO
- affected>= 26.2 and < 26.2R1-S2-EVO
- affected23.4X100
- affected>= 25.2X100 and < 25.2X100-D35-EVO
- affected>= 25.4X300 and < 25.4X300-D40-EVO
As published in the CVE Program record. A version outside these ranges is not a statement that it is unaffected — vendors sometimes understate a range, and distribution-backported builds carry upstream numbers that do not reflect what was patched into them.